Mahon, who competes for Southern Powerlifting, had nine successful lifts from hisnine attempts.
Competing in the under-105kg grade, Ukraine's Igor Makovetskyi topped Mahon's opening 290kg squat with an almost unprecedented 306kg world record.
Mahon responded with a 306.5kg squat to steal the Ukrainian's record from him. Makovetskyi came back with a solid 315kg.
Mahon's response was a 315.5kg final squat re-taking the world record from Makovetskyi.
Makovetskyi, though, was not finished and his final squat of 320kg easily secured him the squat gold medal.
Mahon pressed 167.5kg on the bench and then finished up with the deadlift.
Mahon was trailing Makovetskyi by 22kg and his opening 290kg lift had him catch up 10kg on Makovetskyi.
His second lift was also better than Makovetskyi's by
7.5kg.
Makovetskyi's last lift of 305kg was sufficient, however, and left Mahon requiring an unlikely 327.5kg deadlift to secure the title.
Mahon was successful with his final 312.5kg deadlift, taking a gold medal for the deadlift and silver for the overall title, tallying a 795.5kg total behind Makovetsky's 810kg gold medal position.
Mahon was judged the third-best overall lifter at the championships, with Makovetskyi awarded the title of best overall lifter.
